Quick-change whistle combination



July 17, 1951 ROTH 2,560,895

QUICK-'CHANGE WHISTLE COMBINATION Fil8d,NOV. 19, 1947 g] wv Mum.

LouzsHoih.

Patented July 17, 1951 UNITED STATES PATENT. OFFICE 2,560,895 QUICK-CHANGE WHISTLE COMBINATION Louis Roth, Baltimore, Md.

Application November 19, 1947, Serial No. 786,912

1 Claim.

This invention relates to sound-producing devices such as horns,whistles, etc., and especially to a quick-change whistle combination;that is, a very simple combination of three pieces that may be veryquickly and easily united by their inherent properties includingcontraction and expansion of a rubber strip or strip of other resilientand resonant material that is stretched, tensioned, and expanded betweenthe outer and inner tube-sections for co-operation therewith to producewhistling sounds when air or other gas is forced through saidtube-sections past said resilient strip.

One object of this invention is to provide a whistle that can be quicklyassembled by any person of ordinary ability without the use of any toolsor extrinsic fastening means, and can be quickly disassembled and.reassembled with the resilient strip under alternately higher and lowertensions so as to change the tone or pitch of the sounds with eachreassembling operation.

Another object is to provide a whistle in which all parts are keptunited by their inherent prop erties, including the pressure andclamping effect of the resilient strip between the non-resilient innerand outer members.

Other objects and important features are pointed out or implied in thefollowing details of description, in connection with the accompanyingdrawings in which:

Fig. 1 is a side elevation of a whistle made according to thisinvention.

Fig. 2 is an outer end View, and a view of the interior of the whistle.

Fig. 3 is a sectional view taken in the plane of the axis, the brokenlines showing extent of retraction of the free ends of the resilientstrip after being released by the thumb and finger of the user afterhaving stretched the intermediate part of the strip across the concavedor inwardly converged end of the inner tube-sections and has inserted itin the larger and outer tube-section.

Referring to these drawings in detail, wherein, similar referencecharacters represent similar parts in the several views, the inventionis described in detail as follows:

The whistle comprises the combination of an outer member 5 having anopening 50 therethrough, an inner member 6 having an opening 60therethrough and having one end 6e slightly smaller in cross sectionthan the cross-section of the first said opening, and a resilient andresonant strip i having its intermediate part 12' normally stretchedacross said end and opening of the inner member and disposed therewithin said opening of the outer member and having opposite portions 1einherently expanded against said inner and outer members with pressuresufiicient to removably and adjustably secure all three elements of thewhistle together in cooperative relation.

The inner member 6 and resilient strip 1 have end-portions normallyprotruding from the outer member 5 to provide manipulative elements, sothey can be grasped by a hand of a user for removal from or adjustmentin the outer member; and so the resilient strip can be grasped, pulledand tensioned to various degrees, thereby to obtain various pitches oftone, also to quickly change from a torn or deteriorated resilient stripto a newer or more desirable strip.

The inclined inner end is shown at 6i, and permits air to pass by theintermediate portion of said resonant strip, even if the latter is widerthan the opening it crosses.

The invention also includes the method of forming a whistle by unitingthe outer member 5 and inner member 6 by the inherent resiliency of thestrip 1 as follows: First, stretching said strip across said opening andalong opposite sides of said end of the inner member, with a thumb andfinger holding end portions 1h of said strip pressed against the member6 to keep the intermediate part longitudinally stretched and laterallythinned while inserting said end of said intermediate part of the stripin said outer member, and releasing said end portions to permit saidintermediate portions to laterally expand or thicken between and againstsaid inner and outer members.

I have no intention to limit my patent protection to the precise detailsof explanation, description and disclosure of the drawings, for theinvention is susceptible of numerous changes within the scope of theinventive ideas as implied and claimed.

My invention is claimed as follows:

In a whistle or the like, the combination of an outer member having anopening therethrough, an inner member having an opening therethrough andhaving an insert-end slightly smaller in cross-section than thecross-section of the first said opening and being normally disposedtherein, and a resilient and resonant strip having its middle partnormally tensioned across said insert-end and opening of said innermember and disposed therewith in said opening of the outer member andhaving opposite portions inherently expanded against and between saidinner and outer members with pressure sufli- 4 REFERENCES CITED Thefollowing references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 747,078 Leipold Dec. 15, 1903825,610 Olt July 10, 1906 1,146,640 Miller July 13, 1915 10 1,313,705Lerch 1 Aug. 19, 1919 1,646,530 Ferretti Oct. 25, 1927

